ISO 10502:2012 pdf download – Aerospace- Hose assemblies inpolytetrafluoroethylene (PTFE) for useup to 232°C and 10 500 kPa- Technical specifications and requirements
ISO 10502:2012 pdf download – Aerospace- Hose assemblies inpolytetrafluoroethylene (PTFE) for useup to 232°C and 10 500 kPa- Technical specifications and requirements.
3.9 IdentifIcation of products
The hose assembly and Its component parts shall be permanently marked.
The hose manufacturer’s name or trade mark shall be permanently marked on one element of all end fittings.
3.9.3 Hose assembly
A permanent marking shall be applied on a fitting or on a permanent band or bands securely attached to the hose, Bands shall be no wider than 25 mm (0.98 in) and shall not impair the flexibility or the performance of the hose. Unless otherwise specified, the marking on the fitting or band shall include the following information:
a) the assembly manufacturer’s name or trade mark, and the number of this International Standard (i.e. ISO 10502);
b) the complete hose assembly part number;
C) the nominal pressure, 10 500 kPa (1 523 psl) or as applicable according to Table 3;
d) the operating temperature, 232 C (450 °F) or 135 C (275 F) (as applicable). If required;
e) the pressure test symbol, PT;
1) the date of manufacture of the hose assembly, expressed in terms of month and year, or the batch number;
g) fire resistance type according to ISO 2685 (as applicable).
The hose assembly, including all parts, shall be constructed and finished in a thoroughly workmanlike manner. All surfaces shall be free from burrs and sharp edges.
3.10.2 Dimensions and tolerances
All pertinent dimensions and tolerances, where interchangeability, operation or performance of the hose assembly may be affected, shall be specified on all drawings.
All hose assemblies shall be free from oil, grease, dirt, moisture, cleaning solvents and other foreign materials, both internally and externally.
Hose assemblies shell be inspected as follows when pmpedy cleaned.
a) Visually Inspect hose assembly ends for installation of plug or cap at fitting. Both ends should be firmly capped. An uncovered fitting nipple end shall be cause for rejection.
b) Remove caps or plugs, place a light source at one end of the hose assembly and visually examine the hose assembly, without magnification, from the opposite end. Oil, grease, dirt, moisture or any other foreign materials shall be cause for resection.
3.11.9 Low-temperature fl.xlng
When three test specimens of the sample hose assemblies are tested in accordance with Iso 8829-1, they
shall not show signs of damage after flexing.
When two test specimens of the sample hose assemblies are tested In accordance with ISO 8829-1, there shall be rio leakage.
Two test specimens of the sample hose assemblies shall be tested in accordance with the following procedure. The assembly shall be mounted in a vertical position, pressurized to the operating pressure given in Table 3, and immersed in a (2.5 ±0.1) % NaCI solution for 5 mm then hot air dried at 60 C (140 F) for 25 mm. This cycle shall be repeated for a total of 172 h. Following completion, one assembly shall be room-temperature burst tested in accordance with 3.11.13 and one assembly high-temperature burst tested in accordance with 3.11.14.
3.11.12 Repeated Installation
Two test specimens of the sample hose assemblies shall be tested as follows. Screw end fittings on hose assemblies to appropriate union adaptors eight times using system fluid or an equivalent lubricant. Each of the eight cycles shell include the complete removal of the hose fitting from the manifold union. Tighten fitting nuts to the torques specified in the applicable fitting specification; test one half of the sample to the minimum tightening torque and test the other hail’ to the maximum tightening torque. Following the first, fourth and eighth installation, carry out proof pressure tests in accordance with 3.11.1. Following the eighth installation, pressure test the hose fittings with air or nitrogen gas for 5 mm at the nominal operating pressure.
The assembly end fittings shall show rio signs of leakage, galting or other malfunction.
3.11.13 Burst pressure at room temperature
When two test specimens of the sample hose assemblies are tested in accordance with P508829-i, they shall not leak or burst at any pressure below the burst pressure at the room temperature specified in Table 3.
3.11.14 Burst pressure at high temperature
When two test specimens of the sample hose assemblies are tested in accordance with ISO 8829-1. they shall not leak or burst at any pressure below the high-temperature burst value specified in Table 3.